User guide
Table 4 shows cartridge change-out frequencies in days for each model
heater and gas scrubber for H S and moisture.
2
To determine the cartridge change-out frequency in days for other H S or
2
CHANGE-OUT FREQUENCY
Table 4 FLO-DRI Cartridge Change Schedule in Days
Example 1: Sour Gas H S
2
Your installation has a Cata-Dyne™ heater, model
The concentration of H S in your gas supply is 25 ppm.
2
The change-out frequency for 10 ppm is 70 days (derived from
Table 4).
COF = 70 days x 10ppm / 25 ppm = 28 days.
The FLODRI-10MS scrubber cartridge should be changed once
every 28 days.
H S in Gas Supply
[
X
# DAYS
(Table 3)
Change-out
Frequency
=
]
10 ppm
2
4
WX 12 x 24, 10,000 Btu/hr (2.928 kW/hr) natural gas using a model
FLODRI-10MS cartridge
•
•
•
•
Example 2: Moisture
Your installation has a Cata-Dyne™ heater, model
The concentration of moisture in your gas supply is 25 ppm.
The change-out frequency for 50 ppm is 55 days (derived from
Table 4).
COF = 55 days x 50 ppm / 25 ppm = 110 days.
The FLODRI-10MS scrubber cartridge should be changed once
every 110 days.
Change-out
Moisture in Gas Supply
# DAYS
(Table 3)
X
[ ]
Frequency
=
50 ppm
4
WX 12 x 24, 10,000 Btu/hr (2.928 kW/hr) natural gas using a model
FLODRI-10MS cartridge.
•
•
•
•
WX Series
Heater
Rating
(Btu/hr)
FLODRI-10MS
Days
FLODRI-25MS
Days
FLODRI-10MS
Days
FLODRI-25MS
Days
6 x 6 1,250 560 1,512 440 1,184
6 x 12 2,500 280 756 220 592
6 x 24 5,000 140 378 110 296
8 x 8
2,222 240 648 189 508
10 x 12 4,166 168 454 132 355
12 x 12 5,000 140 378 110 296
12 x 24 10,000 70 189 55 148
12 x 36 15,000 47 126 37 99
12 x 48 20,000 35 95 28 74
12 x 60 25,000 28 76 22 59
12 x 72 30,000 23 63 18 49
18 x 24 15,000 47 126 37 99
18 x 30 18,750 37 101 29 79
18 x 36 22,500 31 84 24 66
18 x 48 30,000 23 63 18 49
18 x 60 37,500 19 50 15 39
18 x 72 45,000 16 42 12 33
24 x 24 20,000 35 95 28 74
24 x 30 25,000 28 76 22 59
24 x 36 30,000 23 63 18 49
24 x 48 40,000 18 47 14 37
24 x 60 50,000 14 38 11 30
24 x 72 60,000 12 32 9 25
Moisture (50 ppm)
Sour Gas H
2
S (10 ppm)
moisture concentrations, use the formulas provided in the
following examples: